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Singh N, Rashid S, Rashid S, Sati HC, Gupta S, Vaswani M, Saraya A. Genetic polymorphisms in phase II metabolizing enzymes in alcoholic and idiopathic chronic pancreatitis: Indian scenario. Indian J Gastroenterol 2023; 42:199-208. [PMID: 37148525 DOI: 10.1007/s12664-022-01320-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 12/04/2022] [Indexed: 05/08/2023]
Abstract
AIM To study polymorphisms in glutathione-S-transferases (GST-T1, GST-M1, GST-P1) and uridine-5'-diphosphate-glucuronosyl-transferases (UGT1A7) genes and the risk of developing chronic pancreatitis (CP) associated with these polymorphisms. METHODS This study included 49 alcoholic and 51 idiopathic chronic pancreatitis patients, 50 alcohol addicts and 50 healthy controls. Polymorphism(s) in GST-T1 and GST-M1 genes were assessed by multiplex polymerase chain reaction (PCR), while PCR-radiofrequency lesioning (RFLP) was employed to assess the same in GST-P1 and UGT1A7 genes. The differences in polymorphism frequency between groups and the risk of developing pancreatitis were assessed by the odds ratio. RESULTS Strong association of the null genotype of GST-T1 with CP susceptibility was observed. Alcoholics with the Val allele of GST-P1 have higher chances of having pancreatitis. Idiopathic pancreatitis patients with higher age at the onset of pain were found to have the null genotype of GST-M1. CONCLUSION Alcoholics with the null genotype of the GST-T1 gene and the Valine allele of the GST-P1 gene are at a higher risk of developing CP. Thus, genotyping of these genes may serve as an important screening tool for the identification of high-risk groups among alcoholics.
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Affiliation(s)
- Nidhi Singh
- Department of Gastroenterology and Human Nutrition Unit, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Safoora Rashid
- Department of Gastroenterology and Human Nutrition Unit, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Sumaira Rashid
- Department of Gastroenterology and Human Nutrition Unit, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Hem Chandra Sati
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Surabhi Gupta
- Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Meera Vaswani
- National Drug Dependence Treatment Centre, All India Institute of Medical Sciences, New Delhi, 110 029, India
| | - Anoop Saraya
- Department of Gastroenterology and Human Nutrition Unit, All India Institute of Medical Sciences, New Delhi, 110 029, India.
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Li Y, Xu C, Xu J, Qin Z, Li S, Hu L, Yao Z, Gonzalez FJ, Yao X. Characterization of metabolic activity, isozyme contribution and species differences of bavachin, and identification of efflux transporters for bavachin-O-glucuronide in HeLa1A1 cells. J Pharm Pharmacol 2020; 72:1771-1786. [DOI: 10.1111/jphp.13324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 04/26/2020] [Indexed: 12/11/2022]
Abstract
Abstract
Objectives
Bavachin is a bioactive natural flavonoid with oestrogen-like activity. Here, we aimed to investigate its metabolic and disposal fates involving in CYPs, UGTs and efflux transporters.
Methods
Phase I metabolism and glucuronidation were performed by human liver microsomes (HLM). Reaction phenotyping and activity correlation analysis were performed to identify the main CYP and UGT isozymes. Chemical inhibition and gene knock-down approaches were employed to explore the function of BCRP and MRPs.
Key findings
Five phase I metabolites (M1–M5) and three glucuronides (G1–G3) were identified. The CLint values for M4 and G1 by HLM were 127.99 and 1159.07 μl/min per mg, respectively. Reaction phenotyping results suggested CYP1A1 (208.85 μl/min per mg) and CYP2C9 (107.51 μl/min per mg), and UGT1A1 (697.19 μl/min per mg), UGT1A7 (535.78 μl/min per mg), UGT1A8 (247.72 μl/min per mg) and UGT1A9 (783.68 μl/min per mg) all participated in the metabolism of bavachin. In addition, activity correlation analysis also supported the results above. Furthermore, the metabolism exhibited marked species differences, and rabbits were the appropriate model animals. Moreover, MRP4 was identified as the main contributor based on chemical inhibition and gene silencing approaches.
Conclusions
CYP1A1 and CYP2C9, UGT1A1, UGT1A7, UGT1A8 and UGT1A9, and MRP4 all played important roles in the metabolism and disposition of bavachin.
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Affiliation(s)
- Yang Li
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Chunxia Xu
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Jinjin Xu
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Zifei Qin
- Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Shishi Li
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Liufang Hu
- College of Pharmacy, Jinan University, Guangzhou, China
| | - Zhihong Yao
- College of Pharmacy, Jinan University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China
| | - Frank J Gonzalez
- Laboratory of Metabolism, Centre for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Xinsheng Yao
- College of Pharmacy, Jinan University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China
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Hu DG, Mackenzie PI, McKinnon RA, Meech R. Genetic polymorphisms of human UDP-glucuronosyltransferase (UGT) genes and cancer risk. Drug Metab Rev 2016; 48:47-69. [DOI: 10.3109/03602532.2015.1131292] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Ishii Y, Koba H, Kinoshita K, Oizaki T, Iwamoto Y, Takeda S, Miyauchi Y, Nishimura Y, Egoshi N, Taura F, Morimoto S, Ikushiro S, Nagata K, Yamazoe Y, Mackenzie PI, Yamada H. Alteration of the Function of the UDP-Glucuronosyltransferase 1A Subfamily by Cytochrome P450 3A4: Different Susceptibility for UGT Isoforms and UGT1A1/7 Variants. Drug Metab Dispos 2013; 42:229-38. [DOI: 10.1124/dmd.113.054833] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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Lacko M, Roelofs HMJ, te Morsche RHM, Voogd AC, Ophuis MBO, Peters WHM, Manni JJ. Genetic polymorphisms in the tobacco smoke carcinogens detoxifying enzyme UGT1A7 and the risk of head and neck cancer. Head Neck 2009; 31:1274-81. [DOI: 10.1002/hed.21090] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Strassburg CP, Kalthoff S, Ehmer U. Variability and function of family 1 uridine-5'-diphosphate glucuronosyltransferases (UGT1A). Crit Rev Clin Lab Sci 2009; 45:485-530. [PMID: 19003600 DOI: 10.1080/10408360802374624] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The substrate spectrum of human UDP-glucuronosyltransferase 1A (UGT1A) proteins includes the glucuronidation of non-steroidal anti-inflammatory drugs, anticonvulsants, chemotherapeutics, steroid hormones, bile acids, and bilirubin. The unique genetic organization of the human UGT1A gene locus, and an increasing number of functionally relevant genetic variants define tissue specificity as well as a broad range of interindividual variabilities of glucuronidation. Genetic UGT1A variability has been conserved throughout the protein's evolution and shows ethnic diversity. It is the biochemical and genetic basis for clinical phenotypes such as Gilbert's syndrome and Crigler-Najjar's disease as well as for the potential for severe, unwanted drug side effects such as in irinotecan treatment. UGT1A variants influence the metabolic effects of xenobiotic exposure and therefore have been linked to cancer risk. Detailed knowledge of the organization, function, and pharmacogenetics of the human UGT1A gene locus is likely to significantly contribute to the improvement of drug safety and efficacy as well as to the provision of steps toward the goal of individualized drug therapy and disease risk prediction.
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Affiliation(s)
- Christian P Strassburg
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Hannover, Germany.
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Abstract
Chronic pancreatitis (CP) is a persistent inflammation of the pancreas. Over the past 12 years, genetic studies of hereditary, familial, and idiopathic forms of CP have made great progress in defining the disease pathogenesis. Identification of gain-of-function missense and copy number mutations in the cationic trypsinogen gene (PRSS1) and loss-of-function variants in both the pancreatic secretory trypsin inhibitor (SPINK1) and chymotrypsinogen C (CTRC) genes has firmly established the pivotal role of prematurely activated trypsin within the pancreas in the etiology of CP. Loss-of-function variants in the cystic fibrosis transmembrane conductance regulator (CFTR) and calcium-sensing receptor (CASR) genes also increase the risk of CP. Here, we review recent developments in this rapidly evolving field, highlight the importance of gene-gene and gene-environment interactions in causing the disease, and discuss the opportunities and challenges in identifying novel genetic factors that affect susceptibility/resistance to CP.
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Affiliation(s)
- Jian-Min Chen
- Institut National de la Santé et de la Recherche Médicale (INSERM), U613, Brest, France.
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Strassburg CP, Lankisch TO, Manns MP, Ehmer U. Family 1 uridine-5'-diphosphate glucuronosyltransferases (UGT1A): from Gilbert's syndrome to genetic organization and variability. Arch Toxicol 2008; 82:415-33. [PMID: 18491077 DOI: 10.1007/s00204-008-0314-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Accepted: 04/30/2008] [Indexed: 12/13/2022]
Abstract
The human UDP-glucuronosyltransferase 1A gene locus is organized to generate enzymes, which share a carboxyterminal portion and are unique at their aminoterminal variable region. Expression is tissue-specific and overlapping substrate specificities include a broad spectrum of endogenous and xenobiotic compounds as well as many therapeutic drugs targeted for detoxification and elimination by glucuronidation. The absence of glucuronidation leads to fatal hyperbilirubinemia. A remarkable interindividual variability of UDP-glucuronosyltransferases is evidenced by over 100 identified genetic variants leading to alterations of catalytic activites or transcription levels. Variant alleles with lower carcinogen detoxification activity have been associated with cancer risk such as colorectal cancer and hepatocellular carcinoma. Genetic variants and haplotypes have been identified as risk factors for unwanted drug effects of the anticancer drug irinotecan and the antiviral proteinase inhibitor atazanavir. Glucuronidation and its variability are likely to represent an important factor for individualized drug therapy and risk prediction impacting the drug development and licensing processes.
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Affiliation(s)
- Christian P Strassburg
- Department of Gastroenterology, Hepatology and Endocrinology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
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Abstract
The observation that only a minority of heavy drinkers develop pancreatitis has prompted an intensive search for a trigger factor/cofactor/susceptibility factor that may precipitate a clinical attack. Putative susceptibility factors examined so far include diet, smoking, amount and type of alcohol consumed, the pattern of drinking and lipid intolerance. In addition, a range of inherited factors have been assessed including blood group antigens, human leukocyte antigen serotypes, alpha-1-antitrypsin phenotypes and several genotypes. The latter group comprises mutations/polymorphisms in genes related to alcohol-metabolizing enzymes, detoxifying enzymes, pancreatic digestive enzymes, pancreatic enzyme inhibitors, cystic fibrosis and cytokines. Disappointingly, despite this concerted research effort, no clear association has been established between the above factors and alcoholic pancreatitis. Experimentally, the secretagogue cholecystokinin (CCK) has been investigated as a candidate 'trigger' for alcoholic pancreatitis. However, the clinical relevance of CCK as a trigger factor has to be questioned, as it is difficult to envisage a situation in humans where abnormally high levels of CCK would be released into the circulation to trigger pancreatitis in alcoholics. In contrast, bacterial endotoxemia is a candidate cofactor that does have relevance to the clinical situation. Plasma lipopolysaccharide (LPS, an endotoxin) levels are significantly higher in drinkers (either after chronic alcohol intake or a single binge) compared to non-drinkers. We have recently shown that alcohol-fed animals challenged with otherwise innocuous doses of LPS exhibit significant pancreatic injury. Moreover, repeated LPS exposure in alcohol-fed rats leads to progressive injury to the gland characterized by significant pancreatic fibrosis. These studies support the concept that endotoxin may be an important factor in the initiation and progression of alcoholic pancreatitis. Scope remains for further studies examining proteins related to cellular anti-oxidant defenses, minor cystic fibrosis (CF) mutations and trans-heterozygosity involving a combination of mutations of different genes (such as CFTR alterations combined with SPINK1 or PRSS1 variants), as potential triggers of alcoholic pancreatitis.
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Affiliation(s)
- Minoti V Apte
- Pancreatic Research Group, South-western Sydney Clinical School, Liverpool Hospital, The University of New South Wales, Sydney, Australia
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